.main1 {z-index: -1;
    margin-top: 60px;
    width: 100%;
    position: absolute;
}

.main1 .txt {

    margin: 30px 50px 0 50px;
    font-weight: bold;
    font-size: 2rem;
    color: #2c3e50;
}

.main1 .txt1 {
    margin: 10px 50px 0 50px;
    font-weight: 800;
    font-size: 1.6rem;
    color: #2c3e50;
}

.main1 .img {
    
    display: block;
    top: 0;
    width: 300px;
    height: 300px;
    position: relative;
    /* margin: -60px auto 0 auto; */
    margin: 90px auto 0 auto;
    /* padding-top: 150px; */
}

.top-navigation,
.main .main-nav{
    background-color: #b9b9b9;
    position: fixed;
}

.top-navigation {
    height: 60px;
    padding: 0 20px 0 50px;
    border-bottom: 1px solid #dbdcdd;
    width: 100%;
}

.top-navigation .top-left {
    float: left;
    width: 214px;
}


.top-navigation .top-left img {
    width: 46px;
    height: 46px;
    padding: 7px;
    float: left;
}

.top-navigation .top-left p {
    visibility: hidden;
    text-align: left;
    font-size: 22px;
    line-height: 46px;
    padding: 7px 0;
    color: black;
}


/* 主体 */

.main {
    display: flex;
}

.main .main-nav {
    width: 12.5%;
}

.main .main-nav,
.main .tabs {
    margin-top: 380px;
    width: 250px;
    height: auto;
    border-radius: 10px;
    border: 1px solid rgb(224, 227, 220);
    background: #7ceae4;
    box-shadow: 22px 22px 44px #d6d6d6;
}

.main .main-nav a {
    position: relative;
    display: block;
    height: 40px;
    padding: 6px 10px;
    background-color: #7ceae4;
    font-size: 1.2em;
    text-align: center;
    line-height: 38px;
    color: #fff;
}

.main .main-nav a:hover p {
    font-weight: 600;
    width: 100%;
    height: 46px;
    background-color: #c3b9b9;
    font-size: 1.4em;
    color: cornflowerblue;
    padding: 3px 7px;
}

h1 {
    margin: 0;
    line-height: 2;
    text-align: center;
}

h2 {
    margin: 0 0 0.5em;
    font-weight: normal;
}
.main .main_nav {
    position: fixed;
    height: 50%;
    margin-top: 380px;
    margin-left: -16px;
    width: 266px;
    overflow: hidden;
}

.main .col {
    width: 98%;
    padding-right: 20px;
    background-color: rgba(0, 0, 0, 0);
    max-height: 100%;
    overflow-y: scroll;
    flex: 1;
}

.main .col input {
    position: absolute;
    opacity: 0;
    z-index: -1;
}

.main .col:last-child {
    margin-left: 1em;
}

.main .col .tabs {
    margin-top: 0;
    border-radius: 8px;
    box-shadow: 0 4px 4px -2px rgba(0, 0, 0, 0.5);
}

.main .col .tab {
    width: 100%;
    color: white;
    overflow: hidden;
}

.main .col .tab-label {
    display: flex;
    justify-content: space-between;
    padding: 1em;
    background: #7ceae4;
    font-weight: bold;
    cursor: pointer;
    /* Icon */
}

.main .col .tab-content a:hover,
.main .col .tab-label:hover {
    background: #3758e4;
}

.main .col .tab-label::after {
    content: "❯";
    width: 1em;
    height: 1em;
    text-align: center;
    transition: all 0.35s;
}

.main .col .tab-content a {
    display: block;
    height: 52px;
    color: white;
    margin-bottom: 8px;
    text-align: center;
    line-height: 52px;
}

.main .col .tab-content {
    max-height: 0;
    /* padding: 0 1em; */
    background: #7ceae4;
    transition: all 0.35s;
}

.main .col .tab-close {
    display: flex;
    justify-content: flex-end;
    padding: 1em;
    font-size: 0.75em;
    background: #7ceae4;
    cursor: pointer;
}

.main .col .tab-close:hover {
    background:#3758e4;
}

.main .col input:checked+.tab-label {
    background:#3758e4;
}

.main .col input:checked+.tab-label::after {
    transform: rotate(90deg);
}

.main .col input:checked~.tab-content {
    max-height: 2000px;
    padding: 1em;
}

.main .main-content {
    overflow-x: hidden;
    display: flex;
    flex-wrap: wrap;
    margin: 70px 0 0 0;
}

.main .main-content .content-li {
    margin-bottom: 12px;
}



.main .main-content .content {
    width: 100%;
    margin-top: 10px;
    border-radius: 10px;
    background: #fbf4f4;
    box-shadow: inset 22px 22px 44px #d3cdcd, inset -22px -22px 44px #ffffff;
}

.content-iframe {
    width: 920px;
    overflow: hidden;
}

#iframe {
    display: none;
    width: 102%;
    /* height: 200%; */
}

.content-iframe,
.main .main-content li {
    margin: 1.12%;
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 22px 22px 44px #d3cdcd, -22px -22px 44px #ffffff;
}

.main .main-content li {
    /* width: 31%; */
    width: 386.4px;
    height: auto;
    background-color: #ffffff;
    float: left;
}

.main .main-content li img {
    width: 94.5%;
    margin: 0 10px 10px 10px;
}

.main .main-content li h1 {
    color: black;
    font-size: 16px;
    font-weight: 600;
    margin: 10px 0 0 10px;
}

.main .main-content li a:hover h1 {
    color: rgb(238, 61, 61);
}

.main .main-content li p {
    height: 32px;
    font-size: 10px;
    color: #9b9898;
    margin: 1px 10px;
    text-align: left;
}

.main .main-content .tit {
    margin-left: 20px;
    font-size: 30px;
    font-weight: 700;
    padding-top: 80px;
    margin-top: -70px;
}

@import url('https://fonts.googleapis.com/css?family=Varela+Round');
html, body {
    overflow-x: hidden;
    height: 100%;
}
body {
    background: #fff;
    padding: 0;
    margin: 0;
    font-family: 'Varela Round', sans-serif;
}

#sidebarMenu {
    height:320px;
    position: fixed;
    left: 0;
    width: 250px;
    margin-top: 60px;
    transform: translateX(-250px);
    transition: transform 250ms ease-in-out;
    background: #7ceae4;
    /* background: linear-gradient(180deg, #FC466B 0%, #3F5EFB 100%); */
}
.sidebarMenuInner{
    margin:0;
    padding:0;
    border-top: 1px solid rgba(255, 255, 255, 0.10);
}
.sidebarMenuInner li{
    list-style: none;
    color: #fff;
    text-align: center;
    text-transform: uppercase;
    font-weight: bold;
    padding: 15px;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}
.sidebarMenuInner li span{
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.50);
}
.sidebarMenuInner li a{
    color: #fff;
    text-transform: uppercase;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
}

input[type="checkbox"]:checked ~ #sidebarMenu{
    transform: translateX(0);
}

input[type=checkbox] {
    transition: all 0.3s;
    box-sizing: border-box;
    display: none;
}
.sidebarIconToggle {
    transition: all 0.3s;
    box-sizing: border-box;
    cursor: pointer;
    position: absolute;
    z-index: 99;
    height: 100%;
    width: 100%;
    top: 22px;
    left: 15px;
    height: 22px;
    width: 22px;
}
.spinner {
    transition: all 0.3s;
    box-sizing: border-box;
    position: absolute;
    height: 3px;
    width: 100%;
    background-color: #fff;
}
.horizontal {
    transition: all 0.3s;
    box-sizing: border-box;
    position: relative;
    float: left;
    margin-top: 3px;
}
.diagonal.part-1 {
    position: relative;
    transition: all 0.3s;
    box-sizing: border-box;
    float: left;
}
.diagonal.part-2 {
    transition: all 0.3s;
    box-sizing: border-box;
    position: relative;
    float: left;
    margin-top: 3px;
}
input[type=checkbox]:checked ~ .sidebarIconToggle > .horizontal {
    transition: all 0.3s;
    box-sizing: border-box;
    opacity: 0;
}
input[type=checkbox]:checked ~ .sidebarIconToggle > .diagonal.part-1 {
    transition: all 0.3s;
    box-sizing: border-box;
    transform: rotate(135deg);
    margin-top: 8px;
}
input[type=checkbox]:checked ~ .sidebarIconToggle > .diagonal.part-2 {
    transition: all 0.3s;
    box-sizing: border-box;
    transform: rotate(-135deg);
    margin-top: -9px;
}